关键词: 钛磁铁矿, 钛铁矿, 可浮性, 磁团聚

Abstract: Titano-magnetite has considerable bad effect on ilmenite floatation.The tests results of mono-mineral floatation show that titano-magnetite presents better floatability than ilmenite.Some gangues wrapped by titano-magnetite will go into the floatation concentrate, which decrease the TiO₂ grade and consume more reagents in flotation.And the magnetic aggregation easily occurs in the titano-magnetite ore, resulting in the mechanical entrapment.That the titano-magnetite entraining with gauges comes into the flotation concentration can decrease the concentrate grade and recovery.The comparison floatation tests with magnetic tailings of vanadium titano-magnetite showed that the floatation concentrate grading at 44.02% of TiO2 with recovery of 44.38% were obtained by the direct flotation without Fe removal.If Fe in titano-magnetite was removed by low intensity magnetic separation before floatation, TiO₂ grade of final floatation concentrate increased to 47.40% and the recovery increased to 52.64% through the same flotation flow-sheet and reagents.

Key words: Titano-magnetite, Ilmenite, Flotation, Magnetic aggregation